Picture 1:
<a href="http://www.flickr.com/photos/brandondoran/4877152470/" title="Triangles by Brandon Doran, on Flickr"><img src="http://farm5.staticflickr.com/4135/4877152470_4e6d5d5af4.jpg" width="500" height="332" alt="Triangles"></a>

Picture 2:
<a href="http://www.flickr.com/photos/dlahoz/236930439/" title="Triangle by David Lahoz, on Flickr"><img src="http://farm1.staticflickr.com/82/236930439_f229a120e4.jpg" width="332" height="500" alt="Triangle"></a>

Picture 3:
<a href="http://www.flickr.com/photos/ciordia/2696392633/" title="Circles in Square, 4 Count by Andy Ciordia, on Flickr"><img src="http://farm4.staticflickr.com/3184/2696392633_62dd919cbe.jpg" width="500" height="332" alt="Circles in Square, 4 Count"></a>

Picture 4:
<a href="http://www.flickr.com/photos/thewendyhouse/425446560/" title="...in the round Window by :: Wendy ::, on Flickr"><img src="http://farm1.staticflickr.com/156/425446560_7b45e27769.jpg" width="375" height="500" alt="...in the round Window"></a>

Picture 5:
<a href="http://www.flickr.com/photos/cycrolu/3089676743/" title="Triangle to the Sky (Extra #257) by Cycrolu, on Flickr"><img src="http://farm4.staticflickr.com/3024/3089676743_189a67a9bf.jpg" width="500" height="375" alt="Triangle to the Sky (Extra #257)"></a>

Picture 6:
<a href="http://www.flickr.com/photos/42925362@N08/4316583958/" title="triangle by ginny russell, on Flickr"><img src="http://farm3.staticflickr.com/2732/4316583958_4280a48a2c.jpg" width="500" height="305" alt="triangle"></a>

Picture 7:
<a href="http://www.flickr.com/photos/edinburghsteve/40863627/" title="STOP by edinburghsteve, on Flickr"><img src="http://farm1.staticflickr.com/23/40863627_5b0092c1c0.jpg" width="500" height="375" alt="STOP"></a>